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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.bcel;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.bcel.generic.ClassElementValueGen;
import org.apache.bcel.generic.ClassGen;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.ElementValueGen;
import org.apache.bcel.generic.EnumElementValueGen;
import org.apache.bcel.generic.ObjectType;
import org.apache.bcel.generic.SimpleElementValueGen;
public class ElementValueGenTestCase extends AbstractTestCase
{
private ClassGen createClassGen(final String classname)
{
return new ClassGen(classname, "java.lang.Object", "<generated>",
Const.ACC_PUBLIC | Const.ACC_SUPER, null);
}
/**
* Create primitive element values
*/
public void testCreateIntegerElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_INT, cp, 555);
// Creation of an element like that should leave a new entry in the
// cpool
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + cp.lookupInteger(555),
evg.getIndex() == cp.lookupInteger(555));
checkSerialize(evg, cp);
}
public void testCreateFloatElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_FLOAT, cp, 111.222f);
// Creation of an element like that should leave a new entry in the
// cpool
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + cp.lookupFloat(111.222f), evg
.getIndex() == cp.lookupFloat(111.222f));
checkSerialize(evg, cp);
}
public void testCreateDoubleElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_DOUBLE, cp, 333.44);
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupDouble(333.44);
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
public void testCreateLongElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_LONG, cp, 3334455L);
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupLong(3334455L);
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
public void testCreateCharElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_CHAR, cp, 't');
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupInteger('t');
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
public void testCreateByteElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_CHAR, cp, (byte) 'z');
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupInteger((byte) 'z');
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
public void testCreateBooleanElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_BOOLEAN, cp, true);
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupInteger(1); // 1 == true
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
public void testCreateShortElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.PRIMITIVE_SHORT, cp, (short) 42);
// Creation of an element like that should leave a new entry in the
// cpool
int idx = cp.lookupInteger(42);
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + idx, evg.getIndex() == idx);
checkSerialize(evg, cp);
}
// //
// Create string element values
public void testCreateStringElementValue()
{
// Create HelloWorld
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
SimpleElementValueGen evg = new SimpleElementValueGen(
ElementValueGen.STRING, cp, "hello");
// Creation of an element like that should leave a new entry in the
// cpool
assertTrue("Should have the same index in the constantpool but "
+ evg.getIndex() + "!=" + cp.lookupUtf8("hello"), evg
.getIndex() == cp.lookupUtf8("hello"));
checkSerialize(evg, cp);
}
// //
// Create enum element value
public void testCreateEnumElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
ObjectType enumType = new ObjectType("SimpleEnum"); // Supports rainbow
// :)
EnumElementValueGen evg = new EnumElementValueGen(enumType, "Red", cp);
// Creation of an element like that should leave a new entry in the
// cpool
assertTrue(
"The new ElementValue value index should match the contents of the constantpool but "
+ evg.getValueIndex() + "!=" + cp.lookupUtf8("Red"),
evg.getValueIndex() == cp.lookupUtf8("Red"));
// BCELBUG: Should the class signature or class name be in the constant
// pool? (see note in ConstantPool)
// assertTrue("The new ElementValue type index should match the contents
// of the constantpool but "+
// evg.getTypeIndex()+"!="+cp.lookupClass(enumType.getSignature()),
// evg.getTypeIndex()==cp.lookupClass(enumType.getSignature()));
checkSerialize(evg, cp);
}
// //
// Create class element value
public void testCreateClassElementValue()
{
ClassGen cg = createClassGen("HelloWorld");
ConstantPoolGen cp = cg.getConstantPool();
ObjectType classType = new ObjectType("java.lang.Integer");
ClassElementValueGen evg = new ClassElementValueGen(classType, cp);
assertTrue("Unexpected value for contained class: '"
+ evg.getClassString() + "'", evg.getClassString().contains("Integer"));
checkSerialize(evg, cp);
}
private void checkSerialize(final ElementValueGen evgBefore, final ConstantPoolGen cpg)
{
try
{
String beforeValue = evgBefore.stringifyValue();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
evgBefore.dump(dos);
dos.flush();
dos.close();
byte[] bs = baos.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(bs);
DataInputStream dis = new DataInputStream(bais);
ElementValueGen evgAfter = ElementValueGen.readElementValue(dis,
cpg);
dis.close();
String afterValue = evgAfter.stringifyValue();
if (!beforeValue.equals(afterValue))
{
fail("Deserialization failed: before='" + beforeValue
+ "' after='" + afterValue + "'");
}
}
catch (IOException ioe)
{
fail("Unexpected exception whilst checking serialization: " + ioe);
}
}
}
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