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/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2005 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.objectweb.asm.util;
import java.util.HashMap;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.Type;
import org.objectweb.asm.util.attrs.ASMifiable;
/**
* An abstract ASMifier visitor.
*
* @author Eric Bruneton
*/
public class ASMifierAbstractVisitor extends AbstractVisitor {
/**
* The name of the variable for this visitor in the produced code.
*/
protected String name;
/**
* The label names. This map associates String values to Label keys. It is
* used only in ASMifierMethodVisitor.
*/
HashMap labelNames;
/**
* Constructs a new {@link ASMifierAbstractVisitor}.
*
* @param name the name of the variable for this visitor in the produced
* code.
*/
protected ASMifierAbstractVisitor(final String name) {
this.name = name;
}
/**
* Prints the ASM code that generates the given annotation.
*
* @param desc the class descriptor of the annotation class.
* @param visible <tt>true</tt> if the annotation is visible at runtime.
* @return a visitor to visit the annotation values.
*/
public AnnotationVisitor visitAnnotation(
final String desc,
final boolean visible)
{
buf.setLength(0);
buf.append("{\n")
.append("av0 = ")
.append(name)
.append(".visitAnnotation(");
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);
text.add(av.getText());
text.add("}\n");
return av;
}
/**
* Prints the ASM code that generates the given attribute.
*
* @param attr an attribute.
*/
public void visitAttribute(final Attribute attr) {
buf.setLength(0);
if (attr instanceof ASMifiable) {
buf.append("{\n");
buf.append("// ATTRIBUTE\n");
((ASMifiable) attr).asmify(buf, "attr", labelNames);
buf.append(name).append(".visitAttribute(attr);\n");
buf.append("}\n");
} else {
buf.append("// WARNING! skipped a non standard attribute of type \"");
buf.append(attr.type).append("\"\n");
}
text.add(buf.toString());
}
/**
* Prints the ASM code to end the visit.
*/
public void visitEnd() {
buf.setLength(0);
buf.append(name).append(".visitEnd();\n");
text.add(buf.toString());
}
/**
* Appends a string representation of the given constant to the given
* buffer.
*
* @param cst an {@link Integer}, {@link Float}, {@link Long},
* {@link Double} or {@link String} object. May be <tt>null</tt>.
*/
void appendConstant(final Object cst) {
appendConstant(buf, cst);
}
/**
* Appends a string representation of the given constant to the given
* buffer.
*
* @param buf a string buffer.
* @param cst an {@link Integer}, {@link Float}, {@link Long},
* {@link Double} or {@link String} object. May be <tt>null</tt>.
*/
static void appendConstant(final StringBuffer buf, final Object cst) {
if (cst == null) {
buf.append("null");
} else if (cst instanceof String) {
appendString(buf, (String) cst);
} else if (cst instanceof Type) {
buf.append("Type.getType(\"");
buf.append(((Type) cst).getDescriptor());
buf.append("\")");
} else if (cst instanceof Byte) {
buf.append("new Byte((byte)").append(cst).append(")");
} else if (cst instanceof Boolean) {
buf.append("new Boolean(").append(cst).append(")");
} else if (cst instanceof Short) {
buf.append("new Short((short)").append(cst).append(")");
} else if (cst instanceof Character) {
int c = ((Character) cst).charValue();
buf.append("new Character((char)").append(c).append(")");
} else if (cst instanceof Integer) {
buf.append("new Integer(").append(cst).append(")");
} else if (cst instanceof Float) {
buf.append("new Float(\"").append(cst).append("\")");
} else if (cst instanceof Long) {
buf.append("new Long(").append(cst).append("L)");
} else if (cst instanceof Double) {
buf.append("new Double(\"").append(cst).append("\")");
} else if (cst instanceof byte[]) {
byte[] v = (byte[]) cst;
buf.append("new byte[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append("}");
} else if (cst instanceof boolean[]) {
boolean[] v = (boolean[]) cst;
buf.append("new boolean[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append("}");
} else if (cst instanceof short[]) {
short[] v = (short[]) cst;
buf.append("new short[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append("(short)").append(v[i]);
}
buf.append("}");
} else if (cst instanceof char[]) {
char[] v = (char[]) cst;
buf.append("new char[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",")
.append("(char)")
.append((int) v[i]);
}
buf.append("}");
} else if (cst instanceof int[]) {
int[] v = (int[]) cst;
buf.append("new int[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append("}");
} else if (cst instanceof long[]) {
long[] v = (long[]) cst;
buf.append("new long[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append("L");
}
buf.append("}");
} else if (cst instanceof float[]) {
float[] v = (float[]) cst;
buf.append("new float[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append("f");
}
buf.append("}");
} else if (cst instanceof double[]) {
double[] v = (double[]) cst;
buf.append("new double[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append("d");
}
buf.append("}");
}
}
}
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