LANG-1015: Add JsonToStringStyle implementation to ToStringStyle. This fixes #12 and #26 from github. Thanks to Thiago Andrade.
git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1648919 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Benedikt Ritter
parent
c87380f0d9
commit
c4ddbe6456
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@ -22,6 +22,7 @@
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<body>
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<release version="3.4" date="tba" description="tba">
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<action issue="LANG-1015" type="add" dev="britter" due-to="Thiago Andrade">Add JsonToStringStyle implementation to ToStringStyle</action>
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<action issue="LANG-1080" type="add" dev="britter" due-to="Innokenty Shuvalov">Add NoClassNameToStringStyle implementation of ToStringStyle</action>
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<action issue="LANG-1071" type="update" dev="britter" due-to="Arno Noordover">Fix wrong examples in JavaDoc of StringUtils.replaceEachRepeatedly(...), StringUtils.replaceEach(...)</action>
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<action issue="LANG-883" type="add" dev="britter" due-to="Daniel Stewart">Add StringUtils.containsAny(CharSequence, CharSequence...) method</action>
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@ -139,6 +139,29 @@ public abstract class ToStringStyle implements Serializable {
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*/
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public static final ToStringStyle NO_CLASS_NAME_STYLE = new NoClassNameToStringStyle();
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/**
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* The JSON toString style. Using the <code>Person</code> example from
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* {@link ToStringBuilder}, the output would look like this:
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*
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* <pre>
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* {
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* "name": "John Doe",
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* "age": 33,
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* "smoker": true
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* }
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* </pre>
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*
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* <strong>Note:</strong> Since field names are mandatory in JSON, this
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* ToStringStyle will throw an {@link UnsupportedOperationException} if no
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* field name is passed in while appending. Furthermore This ToStringStyle
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* will only generate valid JSON if referenced objects also produce JSON
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* when calling {@code toString()} on them.
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*
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* @since 3.4
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* @see <a href="http://json.org">json.org</a>
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*/
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public static final ToStringStyle JSON_STYLE = new JsonToStringStyle();
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/**
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* <p>
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* A registry of objects used by <code>reflectionToString</code> methods
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@ -2326,4 +2349,265 @@ public abstract class ToStringStyle implements Serializable {
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}
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// ----------------------------------------------------------------------------
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/**
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* <p>
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* <code>ToStringStyle</code> that outputs with JSON format.
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* </p>
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*
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* <p>
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* This is an inner class rather than using
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* <code>StandardToStringStyle</code> to ensure its immutability.
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* </p>
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*/
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private static final class JsonToStringStyle extends ToStringStyle {
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private static final long serialVersionUID = 1L;
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/**
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* The summary size text start <code>'>'</code>.
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*/
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private String FIELD_NAME_PREFIX = "\"";
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/**
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* <p>
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* Constructor.
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* </p>
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*
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* <p>
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* Use the static constant rather than instantiating.
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* </p>
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*/
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JsonToStringStyle() {
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super();
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this.setUseClassName(false);
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this.setUseIdentityHashCode(false);
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this.setContentStart("{");
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this.setContentEnd("}");
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this.setArrayStart("[");
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this.setArrayEnd("]");
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this.setFieldSeparator(",");
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this.setFieldNameValueSeparator(":");
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this.setNullText("null");
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this.setSummaryObjectStartText("\"<");
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this.setSummaryObjectEndText(">\"");
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this.setSizeStartText("\"<size=");
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this.setSizeEndText(">\"");
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}
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@Override
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public void append(StringBuffer buffer, String fieldName,
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Object[] array, Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName, long[] array,
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Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName, int[] array,
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Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName,
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short[] array, Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName, byte[] array,
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Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName, char[] array,
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Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName,
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double[] array, Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName,
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float[] array, Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName,
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boolean[] array, Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, array, fullDetail);
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}
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@Override
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public void append(StringBuffer buffer, String fieldName, Object value,
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Boolean fullDetail) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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if (!isFullDetail(fullDetail)){
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throw new UnsupportedOperationException(
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"FullDetail must be true when using JsonToStringStyle");
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}
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super.append(buffer, fieldName, value, fullDetail);
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}
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@Override
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protected void appendDetail(StringBuffer buffer, String fieldName, Object value) {
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if (value == null) {
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appendNullText(buffer, fieldName);
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return;
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}
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if (value.getClass() == String.class) {
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appendValueAsString(buffer, (String)value);
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return;
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}
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buffer.append(value);
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}
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private void appendValueAsString(StringBuffer buffer, String value) {
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buffer.append("\"" + value + "\"");
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}
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@Override
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protected void appendFieldStart(StringBuffer buffer, String fieldName) {
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if (fieldName == null) {
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throw new UnsupportedOperationException(
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"Field names are mandatory when using JsonToStringStyle");
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}
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super.appendFieldStart(buffer, FIELD_NAME_PREFIX + fieldName
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+ FIELD_NAME_PREFIX);
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}
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/**
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* <p>
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* Ensure <code>Singleton</code> after serialization.
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* </p>
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*
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* @return the singleton
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*/
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private Object readResolve() {
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return ToStringStyle.JSON_STYLE;
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}
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}
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}
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@ -0,0 +1,414 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.lang3.builder;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.fail;
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import java.util.ArrayList;
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import java.util.HashMap;
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import org.apache.commons.lang3.SystemUtils;
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import org.apache.commons.lang3.builder.ToStringStyleTest.Person;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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/**
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* Unit tests {@link org.apache.commons.lang3.builder.JsonToStringStyleTest}.
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*
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* @version $Id$
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*/
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public class JsonToStringStyleTest {
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private final Integer base = Integer.valueOf(5);
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@Before
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public void setUp() throws Exception {
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ToStringBuilder.setDefaultStyle(ToStringStyle.JSON_STYLE);
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}
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@After
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public void tearDown() throws Exception {
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ToStringBuilder.setDefaultStyle(ToStringStyle.DEFAULT_STYLE);
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}
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// ----------------------------------------------------------------
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@Test
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public void testNull() {
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assertEquals(String.valueOf((Object) null),
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new ToStringBuilder(null).toString());
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}
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@Test
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public void testBlank() {
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assertEquals("{}", new ToStringBuilder(base).toString());
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}
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@Test
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public void testAppendSuper() {
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assertEquals(
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"{}",
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new ToStringBuilder(base).appendSuper(
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"Integer@8888[" + SystemUtils.LINE_SEPARATOR + "]")
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.toString());
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assertEquals(
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"{}",
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new ToStringBuilder(base).appendSuper(
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"Integer@8888[" + SystemUtils.LINE_SEPARATOR + " null"
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+ SystemUtils.LINE_SEPARATOR + "]").toString());
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assertEquals(
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"{\"a\":\"hello\"}",
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new ToStringBuilder(base)
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.appendSuper(
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"Integer@8888[" + SystemUtils.LINE_SEPARATOR
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+ "]").append("a", "hello").toString());
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assertEquals(
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"{\"a\":\"hello\"}",
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new ToStringBuilder(base)
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.appendSuper(
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"Integer@8888[" + SystemUtils.LINE_SEPARATOR
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+ " null" + SystemUtils.LINE_SEPARATOR
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+ "]").append("a", "hello").toString());
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assertEquals("{\"a\":\"hello\"}", new ToStringBuilder(base)
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.appendSuper(null).append("a", "hello").toString());
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}
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@Test
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public void testObject() {
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final Integer i3 = Integer.valueOf(3);
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final Integer i4 = Integer.valueOf(4);
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try {
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assertEquals("{\"null\":null}",
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new ToStringBuilder(base).append((Object) null).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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try {
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assertEquals("{\"null\":3}", new ToStringBuilder(base).append(i3)
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.toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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assertEquals("{\"a\":null}",
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new ToStringBuilder(base).append("a", (Object) null).toString());
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assertEquals("{\"a\":3}", new ToStringBuilder(base).append("a", i3)
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.toString());
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assertEquals("{\"a\":3,\"b\":4}",
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new ToStringBuilder(base).append("a", i3).append("b", i4)
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.toString());
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try {
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assertEquals("{\"a\":\"<Integer>\"}",
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new ToStringBuilder(base).append("a", i3, false).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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try {
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assertEquals(
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"{\"a\":\"<size=0>\"}",
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new ToStringBuilder(base).append("a", new ArrayList<Object>(),
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false).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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assertEquals(
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"{\"a\":[]}",
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new ToStringBuilder(base).append("a", new ArrayList<Object>(),
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true).toString());
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try {
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assertEquals(
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"{\"a\":\"<size=0>\"}",
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new ToStringBuilder(base).append("a",
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new HashMap<Object, Object>(), false).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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assertEquals(
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"{\"a\":{}}",
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new ToStringBuilder(base).append("a",
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new HashMap<Object, Object>(), true).toString());
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try {
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assertEquals(
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"{\"a\":\"<size=0>\"}",
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new ToStringBuilder(base).append("a", (Object) new String[0],
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false).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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assertEquals(
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"{\"a\":[]}",
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new ToStringBuilder(base).append("a", (Object) new String[0],
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true).toString());
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try {
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assertEquals(
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"{\"a\":\"<size=3>\"}",
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new ToStringBuilder(base).append("a",
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(Object) new int[] { 1, 2, 3 }, false).toString());
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fail("Should have generated UnsupportedOperationException");
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} catch (UnsupportedOperationException e) {
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}
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assertEquals(
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"{\"a\":[1,2,3]}",
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new ToStringBuilder(base).append("a",
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(Object) new int[] { 1, 2, 3 }, true).toString());
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try {
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assertEquals(
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"{\"a\":\"<size=4>\"}",
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new ToStringBuilder(base).append("a",
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(Object) new String[] { "v", "x", "y", "z" }, false)
|
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.toString());
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fail("Should have generated UnsupportedOperationException");
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|
||||
} catch (UnsupportedOperationException e) {
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}
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assertEquals(
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"{\"a\":[\"v\",\"x\",\"y\",\"z\"]}",
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new ToStringBuilder(base).append("a",
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(Object) new String[] { "v", "x", "y", "z" }, true)
|
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.toString());
|
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}
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@Test
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public void testPerson() {
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final Person p = new Person();
|
||||
|
||||
p.name = "Jane Doe";
|
||||
p.age = 25;
|
||||
p.smoker = true;
|
||||
|
||||
assertEquals(
|
||||
"{\"name\":\"Jane Doe\",\"age\":25,\"smoker\":true}",
|
||||
new ToStringBuilder(p).append("name", p.name)
|
||||
.append("age", p.age).append("smoker", p.smoker)
|
||||
.toString());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testLong() {
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":3}", new ToStringBuilder(base).append(3L)
|
||||
.toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
assertEquals("{\"a\":3}", new ToStringBuilder(base).append("a", 3L)
|
||||
.toString());
|
||||
|
||||
assertEquals("{\"a\":3,\"b\":4}",
|
||||
new ToStringBuilder(base).append("a", 3L).append("b", 4L)
|
||||
.toString());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testObjectArray() {
|
||||
|
||||
Object[] array = new Object[] { null, base, new int[] { 3, 6 } };
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[null,5,[3,6]]}", new ToStringBuilder(base)
|
||||
.append(array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[null,5,[3,6]]}", new ToStringBuilder(base)
|
||||
.append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
array = null;
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}", new ToStringBuilder(base).append(array)
|
||||
.toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}",
|
||||
new ToStringBuilder(base).append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testLongArray() {
|
||||
|
||||
long[] array = new long[] { 1, 2, -3, 4 };
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[1,2,-3,4]}",
|
||||
new ToStringBuilder(base).append(array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[1,2,-3,4]}",
|
||||
new ToStringBuilder(base).append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
array = null;
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}", new ToStringBuilder(base).append(array)
|
||||
.toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}",
|
||||
new ToStringBuilder(base).append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testLongArrayArray() {
|
||||
|
||||
long[][] array = new long[][] { { 1, 2 }, null, { 5 } };
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[[1,2],null,[5]]}", new ToStringBuilder(base)
|
||||
.append(array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":[[1,2],null,[5]]}", new ToStringBuilder(base)
|
||||
.append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
array = null;
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}", new ToStringBuilder(base).append(array)
|
||||
.toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
|
||||
try {
|
||||
|
||||
assertEquals("{\"null\":null}",
|
||||
new ToStringBuilder(base).append((Object) array).toString());
|
||||
|
||||
fail("Should have generated UnsupportedOperationException");
|
||||
|
||||
} catch (UnsupportedOperationException e) {
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue