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Diffstat (limited to 'tools/external/asm/org/objectweb/asm/signature/SignatureWriter.java')
| -rw-r--r-- | tools/external/asm/org/objectweb/asm/signature/SignatureWriter.java | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/signature/SignatureWriter.java b/tools/external/asm/org/objectweb/asm/signature/SignatureWriter.java new file mode 100644 index 000000000..b78d666a5 --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/signature/SignatureWriter.java @@ -0,0 +1,207 @@ +/*** + * 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.signature; + +/** + * A signature visitor that generates signatures in string format. + * + * @author Thomas Hallgren + * @author Eric Bruneton + */ +public class SignatureWriter implements SignatureVisitor { + + /** + * Buffer used to construct the signature. + */ + private final StringBuffer buf = new StringBuffer(); + + /** + * Indicates if the signature contains formal type parameters. + */ + private boolean hasFormals; + + /** + * Indicates if the signature contains method parameter types. + */ + private boolean hasParameters; + + /** + * 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; + + /** + * Constructs a new {@link SignatureWriter} object. + */ + public SignatureWriter() { + } + + // ------------------------------------------------------------------------ + // Implementation of the SignatureVisitor interface + // ------------------------------------------------------------------------ + + public void visitFormalTypeParameter(String name) { + if (!hasFormals) { + hasFormals = true; + buf.append('<'); + } + buf.append(name); + buf.append(':'); + } + + public SignatureVisitor visitClassBound() { + return this; + } + + public SignatureVisitor visitInterfaceBound() { + buf.append(':'); + return this; + } + + public SignatureVisitor visitSuperclass() { + endFormals(); + return this; + } + + public SignatureVisitor visitInterface() { + return this; + } + + public SignatureVisitor visitParameterType() { + endFormals(); + if (!hasParameters) { + hasParameters = true; + buf.append('('); + } + return this; + } + + public SignatureVisitor visitReturnType() { + endFormals(); + if (!hasParameters) { + buf.append('('); + } + buf.append(')'); + return this; + } + + public SignatureVisitor visitExceptionType() { + buf.append('^'); + return this; + } + + public void visitBaseType(char descriptor) { + buf.append(descriptor); + } + + public void visitTypeVariable(String name) { + buf.append('T'); + buf.append(name); + buf.append(';'); + } + + public SignatureVisitor visitArrayType() { + buf.append('['); + return this; + } + + public void visitClassType(String name) { + buf.append('L'); + buf.append(name); + argumentStack *= 2; + } + + public void visitInnerClassType(String name) { + endArguments(); + buf.append('.'); + buf.append(name); + argumentStack *= 2; + } + + public void visitTypeArgument() { + if (argumentStack % 2 == 0) { + ++argumentStack; + buf.append('<'); + } + buf.append('*'); + } + + public SignatureVisitor visitTypeArgument(char wildcard) { + if (argumentStack % 2 == 0) { + ++argumentStack; + buf.append('<'); + } + if (wildcard != '=') { + buf.append(wildcard); + } + return this; + } + + public void visitEnd() { + endArguments(); + buf.append(';'); + } + + /** + * Returns the signature that was built by this signature writer. + * + * @return the signature that was built by this signature writer. + */ + public String toString() { + return buf.toString(); + } + + // ------------------------------------------------------------------------ + // Utility methods + // ------------------------------------------------------------------------ + + /** + * Ends the formal type parameters section of the signature. + */ + private void endFormals() { + if (hasFormals) { + hasFormals = false; + buf.append('>'); + } + } + + /** + * Ends the type arguments of a class or inner class type. + */ + private void endArguments() { + if (argumentStack % 2 == 1) { + buf.append('>'); + } + argumentStack /= 2; + } +}
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