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Diffstat (limited to 'tools/external/asm/org/objectweb/asm/util/TraceSignatureVisitor.java')
| -rw-r--r-- | tools/external/asm/org/objectweb/asm/util/TraceSignatureVisitor.java | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/util/TraceSignatureVisitor.java b/tools/external/asm/org/objectweb/asm/util/TraceSignatureVisitor.java new file mode 100644 index 000000000..c7145c0e8 --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/util/TraceSignatureVisitor.java @@ -0,0 +1,300 @@ +/*** + * 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 org.objectweb.asm.Opcodes; +import org.objectweb.asm.signature.SignatureVisitor; + +/** + * A {@link SignatureVisitor} that prints a disassembled view of the signature + * it visits. + * + * @author Eugene Kuleshov + * @author Eric Bruneton + */ +public class TraceSignatureVisitor implements SignatureVisitor { + + private StringBuffer declaration; + + private boolean isInterface; + + private boolean seenFormalParameter; + + private boolean seenInterfaceBound; + + private boolean seenParameter; + + private boolean seenInterface; + + private StringBuffer returnType; + + private StringBuffer exceptions; + + /** + * Stack used to keep track of class types that have arguments. Each element + * of this stack is a boolean encoded in one bit. The top of the stack is + * the lowest order bit. Pushing false = *2, pushing true = *2+1, popping = + * /2. + */ + private int argumentStack; + + /** + * Stack used to keep track of array class types. Each element of this stack + * is a boolean encoded in one bit. The top of the stack is the lowest order + * bit. Pushing false = *2, pushing true = *2+1, popping = /2. + */ + private int arrayStack; + + private String separator = ""; + + public TraceSignatureVisitor(int access) { + isInterface = (access & Opcodes.ACC_INTERFACE) != 0; + this.declaration = new StringBuffer(); + } + + private TraceSignatureVisitor(StringBuffer buf) { + this.declaration = buf; + } + + public void visitFormalTypeParameter(String name) { + declaration.append(seenFormalParameter ? ", " : "<").append(name); + seenFormalParameter = true; + seenInterfaceBound = false; + } + + public SignatureVisitor visitClassBound() { + separator = " extends "; + startType(); + return this; + } + + public SignatureVisitor visitInterfaceBound() { + separator = seenInterfaceBound ? ", " : " extends "; + seenInterfaceBound = true; + startType(); + return this; + } + + public SignatureVisitor visitSuperclass() { + endFormals(); + separator = " extends "; + startType(); + return this; + } + + public SignatureVisitor visitInterface() { + separator = seenInterface ? ", " : (isInterface + ? " extends " + : " implements "); + seenInterface = true; + startType(); + return this; + } + + public SignatureVisitor visitParameterType() { + endFormals(); + if (!seenParameter) { + seenParameter = true; + declaration.append('('); + } else { + declaration.append(", "); + } + startType(); + return this; + } + + public SignatureVisitor visitReturnType() { + endFormals(); + if (!seenParameter) { + declaration.append('('); + } else { + seenParameter = false; + } + declaration.append(')'); + returnType = new StringBuffer(); + return new TraceSignatureVisitor(returnType); + } + + public SignatureVisitor visitExceptionType() { + if (exceptions == null) { + exceptions = new StringBuffer(); + } else { + exceptions.append(", "); + } + // startType(); + return new TraceSignatureVisitor(exceptions); + } + + public void visitBaseType(char descriptor) { + switch (descriptor) { + case 'V': + declaration.append("void"); + break; + case 'B': + declaration.append("byte"); + break; + case 'J': + declaration.append("long"); + break; + case 'Z': + declaration.append("boolean"); + break; + case 'I': + declaration.append("int"); + break; + case 'S': + declaration.append("short"); + break; + case 'C': + declaration.append("char"); + break; + case 'F': + declaration.append("float"); + break; + // case 'D': + default: + declaration.append("double"); + break; + } + endType(); + } + + public void visitTypeVariable(String name) { + declaration.append(name); + endType(); + } + + public SignatureVisitor visitArrayType() { + startType(); + arrayStack |= 1; + return this; + } + + public void visitClassType(String name) { + if (!"java/lang/Object".equals(name)) { + declaration.append(separator).append(name.replace('/', '.')); + } else { + // Map<java.lang.Object,java.util.List> + // or + // abstract public V get(Object key); (seen in Dictionary.class) + // should have Object + // but java.lang.String extends java.lang.Object is unnecessary + boolean needObjectClass = argumentStack % 2 == 1 || seenParameter; + if (needObjectClass) { + declaration.append(separator).append(name.replace('/', '.')); + } + } + separator = ""; + argumentStack *= 2; + } + + public void visitInnerClassType(String name) { + if (argumentStack % 2 == 1) { + declaration.append('>'); + } + argumentStack /= 2; + declaration.append('.'); + declaration.append(separator).append(name.replace('/', '.')); + separator = ""; + argumentStack *= 2; + } + + public void visitTypeArgument() { + if (argumentStack % 2 == 0) { + ++argumentStack; + declaration.append('<'); + } else { + declaration.append(", "); + } + declaration.append('?'); + } + + public SignatureVisitor visitTypeArgument(char tag) { + if (argumentStack % 2 == 0) { + ++argumentStack; + declaration.append('<'); + } else { + declaration.append(", "); + } + + if (tag == SignatureVisitor.EXTENDS) { + declaration.append("? extends "); + } else if (tag == SignatureVisitor.SUPER) { + declaration.append("? super "); + } + + startType(); + return this; + } + + public void visitEnd() { + if (argumentStack % 2 == 1) { + declaration.append('>'); + } + argumentStack /= 2; + endType(); + } + + public String getDeclaration() { + return declaration.toString(); + } + + public String getReturnType() { + return returnType == null ? null : returnType.toString(); + } + + public String getExceptions() { + return exceptions == null ? null : exceptions.toString(); + } + + // ----------------------------------------------- + + private void endFormals() { + if (seenFormalParameter) { + declaration.append('>'); + seenFormalParameter = false; + } + } + + private void startType() { + arrayStack *= 2; + } + + private void endType() { + if (arrayStack % 2 == 1) { + while (arrayStack % 2 == 1) { + arrayStack /= 2; + declaration.append("[]"); + } + } else { + arrayStack /= 2; + } + } +} |