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src/java.xml/share/classes/com/sun/org/apache/bcel/internal/generic/PUSH.java
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@@ -1,8 +1,7 @@
/*
- * reserved comment block
- * DO NOT REMOVE OR ALTER!
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
*/
/*
* 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.
@@ -19,144 +18,178 @@
* limitations under the License.
*/
package com.sun.org.apache.bcel.internal.generic;
-import com.sun.org.apache.bcel.internal.Constants;
-import java.io.*;
+import com.sun.org.apache.bcel.internal.Const;
/**
* Wrapper class for push operations, which are implemented either as BIPUSH,
* LDC or xCONST_n instructions.
*
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ * @version $Id: PUSH.java 1749598 2016-06-21 20:36:33Z ggregory $
*/
-public final class PUSH
- implements CompoundInstruction, VariableLengthInstruction, InstructionConstants
-{
+public final class PUSH implements CompoundInstruction, VariableLengthInstruction {
+
private Instruction instruction;
+
/**
* This constructor also applies for values of type short, char, byte
*
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, int value) {
- if((value >= -1) && (value <= 5)) // Use ICONST_n
- instruction = INSTRUCTIONS[Constants.ICONST_0 + value];
- else if((value >= -128) && (value <= 127)) // Use BIPUSH
- instruction = new BIPUSH((byte)value);
- else if((value >= -32768) && (value <= 32767)) // Use SIPUSH
- instruction = new SIPUSH((short)value);
- else // If everything fails create a Constant pool entry
+ public PUSH(final ConstantPoolGen cp, final int value) {
+ if ((value >= -1) && (value <= 5)) {
+ instruction = InstructionConst.getInstruction(Const.ICONST_0 + value);
+ } else if (Instruction.isValidByte(value)) {
+ instruction = new BIPUSH((byte) value);
+ } else if (Instruction.isValidShort(value)) {
+ instruction = new SIPUSH((short) value);
+ } else {
instruction = new LDC(cp.addInteger(value));
}
+ }
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, boolean value) {
- instruction = INSTRUCTIONS[Constants.ICONST_0 + (value? 1 : 0)];
+ public PUSH(final ConstantPoolGen cp, final boolean value) {
+ instruction = InstructionConst.getInstruction(Const.ICONST_0 + (value ? 1 : 0));
}
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, float value) {
- if(value == 0.0)
- instruction = FCONST_0;
- else if(value == 1.0)
- instruction = FCONST_1;
- else if(value == 2.0)
- instruction = FCONST_2;
- else // Create a Constant pool entry
+ public PUSH(final ConstantPoolGen cp, final float value) {
+ if (value == 0.0) {
+ instruction = InstructionConst.FCONST_0;
+ } else if (value == 1.0) {
+ instruction = InstructionConst.FCONST_1;
+ } else if (value == 2.0) {
+ instruction = InstructionConst.FCONST_2;
+ } else {
instruction = new LDC(cp.addFloat(value));
}
+ }
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, long value) {
- if(value == 0)
- instruction = LCONST_0;
- else if(value == 1)
- instruction = LCONST_1;
- else // Create a Constant pool entry
+ public PUSH(final ConstantPoolGen cp, final long value) {
+ if (value == 0) {
+ instruction = InstructionConst.LCONST_0;
+ } else if (value == 1) {
+ instruction = InstructionConst.LCONST_1;
+ } else {
instruction = new LDC2_W(cp.addLong(value));
}
+ }
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, double value) {
- if(value == 0.0)
- instruction = DCONST_0;
- else if(value == 1.0)
- instruction = DCONST_1;
- else // Create a Constant pool entry
+ public PUSH(final ConstantPoolGen cp, final double value) {
+ if (value == 0.0) {
+ instruction = InstructionConst.DCONST_0;
+ } else if (value == 1.0) {
+ instruction = InstructionConst.DCONST_1;
+ } else {
instruction = new LDC2_W(cp.addDouble(value));
}
+ }
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, String value) {
- if(value == null)
- instruction = ACONST_NULL;
- else // Create a Constant pool entry
+ public PUSH(final ConstantPoolGen cp, final String value) {
+ if (value == null) {
+ instruction = InstructionConst.ACONST_NULL;
+ } else {
instruction = new LDC(cp.addString(value));
}
+ }
+
+ /**
+ *
+ * @param cp
+ * @param value
+ * @since 6.0
+ */
+ public PUSH(final ConstantPoolGen cp, final ObjectType value) {
+ if (value == null) {
+ instruction = InstructionConst.ACONST_NULL;
+ } else {
+ instruction = new LDC(cp.addClass(value));
+ }
+ }
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, Number value) {
- if((value instanceof Integer) || (value instanceof Short) || (value instanceof Byte))
+ public PUSH(final ConstantPoolGen cp, final Number value) {
+ if ((value instanceof Integer) || (value instanceof Short) || (value instanceof Byte)) {
instruction = new PUSH(cp, value.intValue()).instruction;
- else if(value instanceof Double)
+ } else if (value instanceof Double) {
instruction = new PUSH(cp, value.doubleValue()).instruction;
- else if(value instanceof Float)
+ } else if (value instanceof Float) {
instruction = new PUSH(cp, value.floatValue()).instruction;
- else if(value instanceof Long)
+ } else if (value instanceof Long) {
instruction = new PUSH(cp, value.longValue()).instruction;
- else
+ } else {
throw new ClassGenException("What's this: " + value);
}
+ }
+
/**
+ * creates a push object from a Character value. Warning: Make sure not to attempt to allow
+ * autoboxing to create this value parameter, as an alternative constructor will be called
+ *
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, Character value) {
- this(cp, (int)value.charValue());
+ public PUSH(final ConstantPoolGen cp, final Character value) {
+ this(cp, value.charValue());
}
+
/**
* @param cp Constant pool
* @param value to be pushed
*/
- public PUSH(ConstantPoolGen cp, Boolean value) {
+ public PUSH(final ConstantPoolGen cp, final Boolean value) {
this(cp, value.booleanValue());
}
+
+ @Override
public final InstructionList getInstructionList() {
return new InstructionList(instruction);
}
+
public final Instruction getInstruction() {
return instruction;
}
+
/**
* @return mnemonic for instruction
*/
+ @Override
public String toString() {
- return instruction.toString() + " (PUSH)";
+ return instruction + " (PUSH)";
}
}
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