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Add access method for primitive types 

from Ashwin S


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@131433 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne 2003-12-11 23:45:02 +00:00
parent 6fc38cb3bf
commit a9bee7354a
1 changed files with 277 additions and 2 deletions
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279
src/java/org/apache/commons/collections/MapUtils.java
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@ -1,5 +1,5 @@
/*
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/MapUtils.java,v 1.40 2003/12/03 11:37:44 scolebourne Exp $
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/MapUtils.java,v 1.41 2003/12/11 23:45:02 scolebourne Exp $
* ====================================================================
*
* The Apache Software License, Version 1.1
@ -109,7 +109,7 @@ import org.apache.commons.collections.map.UnmodifiableSortedMap;
* </ul>
*
* @since Commons Collections 1.0
* @version $Revision: 1.40 $ $Date: 2003/12/03 11:37:44 $
* @version $Revision: 1.41 $ $Date: 2003/12/11 23:45:02 $
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
* @author <a href="mailto:nissim@nksystems.com">Nissim Karpenstein</a>
@ -120,6 +120,7 @@ import org.apache.commons.collections.map.UnmodifiableSortedMap;
* @author Arun Mammen Thomas
* @author Janek Bogucki
* @author Max Rydahl Andersen
* @author <a href="mailto:equinus100@hotmail.com">Ashwin S</a>
*/
public class MapUtils {
@ -601,6 +602,280 @@ public class MapUtils {
}
return answer;
}
// Type safe primitive getters
//-------------------------------------------------------------------------
/**
* Gets a boolean from a Map in a null-safe manner.
* <p>
* If the value is a <code>Boolean</code> its value is returned.
* If the value is a <code>String</code> and it equals 'true' ignoring case
* then <code>true</code> is returned, otherwise <code>false</code>.
* If the value is a <code>Number</code> an integer zero value returns
* <code>false</code> and non-zero returns <code>true</code>.
* Otherwise, <code>false</code> is returned.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a Boolean, <code>false</code> if null map input
*/
public static boolean getBooleanValue(final Map map, final Object key) {
Boolean booleanObject = getBoolean(map, key);
if (booleanObject == null) {
return false;
}
return booleanObject.booleanValue();
}
/**
* Gets a byte from a Map in a null-safe manner.
* <p>
* The byte is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a byte, <code>0</code> if null map input
*/
public static byte getByteValue(final Map map, final Object key) {
Byte byteObject = getByte(map, key);
if (byteObject == null) {
return 0;
}
return byteObject.byteValue();
}
/**
* Gets a short from a Map in a null-safe manner.
* <p>
* The short is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a short, <code>0</code> if null map input
*/
public static short getShortValue(final Map map, final Object key) {
Short shortObject = getShort(map, key);
if (shortObject == null) {
return 0;
}
return shortObject.shortValue();
}
/**
* Gets an int from a Map in a null-safe manner.
* <p>
* The int is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as an int, <code>0</code> if null map input
*/
public static int getIntValue(final Map map, final Object key) {
Integer integerObject = getInteger(map, key);
if (integerObject == null) {
return 0;
}
return integerObject.intValue();
}
/**
* Gets a long from a Map in a null-safe manner.
* <p>
* The long is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a long, <code>0L</code> if null map input
*/
public static long getLongValue(final Map map, final Object key) {
Long longObject = getLong(map, key);
if (longObject == null) {
return 0L;
}
return longObject.longValue();
}
/**
* Gets a float from a Map in a null-safe manner.
* <p>
* The float is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a float, <code>0.0F</code> if null map input
*/
public static float getFloatValue(final Map map, final Object key) {
Float floatObject = getFloat(map, key);
if (floatObject == null) {
return 0f;
}
return floatObject.floatValue();
}
/**
* Gets a double from a Map in a null-safe manner.
* <p>
* The double is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @return the value in the Map as a double, <code>0.0</code> if null map input
*/
public static double getDoubleValue(final Map map, final Object key) {
Double doubleObject = getDouble(map, key);
if (doubleObject == null) {
return 0d;
}
return doubleObject.doubleValue();
}
// Type safe primitive getters with default values
//-------------------------------------------------------------------------
/**
* Gets a boolean from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* If the value is a <code>Boolean</code> its value is returned.
* If the value is a <code>String</code> and it equals 'true' ignoring case
* then <code>true</code> is returned, otherwise <code>false</code>.
* If the value is a <code>Number</code> an integer zero value returns
* <code>false</code> and non-zero returns <code>true</code>.
* Otherwise, <code>defaultValue</code> is returned.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a Boolean, <code>defaultValue</code> if null map input
*/
public static boolean getBooleanValue(final Map map, final Object key, boolean defaultValue) {
Boolean booleanObject = getBoolean(map, key);
if (booleanObject == null) {
return defaultValue;
}
return booleanObject.booleanValue();
}
/**
* Gets a byte from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The byte is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a byte, <code>defaultValue</code> if null map input
*/
public static byte getByteValue(final Map map, final Object key, byte defaultValue) {
Byte byteObject = getByte(map, key);
if (byteObject == null) {
return defaultValue;
}
return byteObject.byteValue();
}
/**
* Gets a short from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The short is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a short, <code>defaultValue</code> if null map input
*/
public static short getShortValue(final Map map, final Object key, short defaultValue) {
Short shortObject = getShort(map, key);
if (shortObject == null) {
return defaultValue;
}
return shortObject.shortValue();
}
/**
* Gets an int from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The int is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as an int, <code>defaultValue</code> if null map input
*/
public static int getIntValue(final Map map, final Object key, int defaultValue) {
Integer integerObject = getInteger(map, key);
if (integerObject == null) {
return defaultValue;
}
return integerObject.intValue();
}
/**
* Gets a long from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The long is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a long, <code>defaultValue</code> if null map input
*/
public static long getLongValue(final Map map, final Object key, long defaultValue) {
Long longObject = getLong(map, key);
if (longObject == null) {
return defaultValue;
}
return longObject.longValue();
}
/**
* Gets a float from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The float is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a float, <code>defaultValue</code> if null map input
*/
public static float getFloatValue(final Map map, final Object key, float defaultValue) {
Float floatObject = getFloat(map, key);
if (floatObject == null) {
return defaultValue;
}
return floatObject.floatValue();
}
/**
* Gets a double from a Map in a null-safe manner,
* using the default value if the the conversion fails.
* <p>
* The double is obtained from the results of {@link #getNumber(Map,Object)}.
*
* @param map the map to use
* @param key the key to look up
* @param defaultValue return if the value is null or if the
* conversion fails
* @return the value in the Map as a double, <code>defaultValue</code> if null map input
*/
public static double getDoubleValue(final Map map, final Object key, double defaultValue) {
Double doubleObject = getDouble(map, key);
if (doubleObject == null) {
return defaultValue;
}
return doubleObject.doubleValue();
}
// Conversion methods
//-------------------------------------------------------------------------