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painless: use better typing for dynamic method calls

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This commit is contained in:
Robert Muir 2016-05-10 05:44:16 -04:00
parent ba2fe156e8
commit 3aeb66885b
2 changed files with 9 additions and 5 deletions
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11
modules/lang-painless/src/main/java/org/elasticsearch/painless/WriterExternal.java
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@ -20,6 +20,7 @@
package org.elasticsearch.painless;
import org.antlr.v4.runtime.ParserRuleContext;
import org.elasticsearch.painless.Definition.Cast;
import org.elasticsearch.painless.Definition.Constructor;
import org.elasticsearch.painless.Definition.Field;
import org.elasticsearch.painless.Definition.Method;
@ -714,14 +715,16 @@ class WriterExternal {
// first parameter is the receiver, we never know its type: always Object
signature.append(WriterConstants.OBJECT_TYPE.getDescriptor());
// TODO: remove our explicit conversions and feed more type information for args/return value,
// it can avoid some unnecessary boxing etc.
for (int i = 0; i < arguments.size(); i++) {
signature.append(WriterConstants.OBJECT_TYPE.getDescriptor());
ExpressionMetadata arg = metadata.getExpressionMetadata(arguments.get(i));
// disable any implicit casts/conversion for arguments, let invokeDynamic take care
arg.to = arg.from;
arg.cast = new Cast(arg.from, arg.from);
signature.append(arg.from.type.getDescriptor());
writer.visit(arguments.get(i));
}
signature.append(')');
// return value
// return value: currently always Object. making this better may be tricky...
signature.append(WriterConstants.OBJECT_TYPE.getDescriptor());
execute.visitInvokeDynamicInsn((String)sourceenmd.target, signature.toString(),
WriterConstants.DEF_BOOTSTRAP_HANDLE, new Object[] { DynamicCallSite.METHOD_CALL });

3
modules/lang-painless/src/test/java/org/elasticsearch/painless/WhenThingsGoWrongTests.java
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@ -19,6 +19,7 @@
package org.elasticsearch.painless;
import java.lang.invoke.WrongMethodTypeException;
import java.util.Arrays;
import java.util.Collections;
@ -140,7 +141,7 @@ public class WhenThingsGoWrongTests extends ScriptTestCase {
}
public void testDynamicWrongArgs() {
expectThrows(ClassCastException.class, () -> {
expectThrows(WrongMethodTypeException.class, () -> {
exec("def x = new ArrayList(); return x.get('bogus');");
});
}