com.hazelcast.org.codehaus.janino.MethodDescriptor Maven / Gradle / Ivy
/*
* Janino - An embedded Java[TM] compiler
*
* Copyright (c) 2001-2010 Arno Unkrig. 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 holder 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 HOLDER 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 com.hazelcast.org.codehaus.janino;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import com.hazelcast.org.codehaus.commons.compiler.InternalCompilerException;
import com.hazelcast.org.codehaus.commons.nullanalysis.Nullable;
/**
* Representation of a "method descriptor" (JVMS 4.3.3).
*/
public
class MethodDescriptor {
/**
* The field descriptors of the method parameters.
*/
public final String[] parameterFds;
/**
* The field descriptor of the method return value.
*/
public final String returnFd;
/***/
public
MethodDescriptor(String returnFd, String... parameterFds) {
this.parameterFds = parameterFds;
this.returnFd = returnFd;
}
/**
* Parses a method descriptor into parameter FDs and return FDs.
*/
public
MethodDescriptor(String s) {
if (s.charAt(0) != '(') throw new InternalCompilerException();
int from = 1;
List parameterFDs = new ArrayList();
while (s.charAt(from) != ')') {
int to = from;
while (s.charAt(to) == '[') ++to;
if ("BCDFIJSZ".indexOf(s.charAt(to)) != -1) {
++to;
} else
if (s.charAt(to) == 'L') {
for (++to; s.charAt(to) != ';'; ++to);
++to;
} else {
throw new InternalCompilerException();
}
parameterFDs.add(s.substring(from, to));
from = to;
}
this.parameterFds = (String[]) parameterFDs.toArray(new String[parameterFDs.size()]);
this.returnFd = s.substring(++from);
}
@Override public boolean
equals(@Nullable Object obj) {
if (obj == this) return true;
if (!(obj instanceof MethodDescriptor)) return false;
MethodDescriptor that = (MethodDescriptor) obj;
return Arrays.equals(this.parameterFds, that.parameterFds) && this.returnFd.equals(that.returnFd);
}
@Override public int
hashCode() { return Arrays.hashCode(this.parameterFds) ^ this.returnFd.hashCode(); }
/**
* @return The "method descriptor" (JVMS 4.3.3)
*/
@Override public String
toString() {
StringBuilder sb = new StringBuilder("(");
for (String parameterFd : this.parameterFds) sb.append(parameterFd);
return sb.append(')').append(this.returnFd).toString();
}
/**
* @return A {@link MethodDescriptor} equal to {@code this}, but with another parameter inserted at position zero
*/
public MethodDescriptor
prependParameter(String parameterFd) {
String[] tmp = new String[1 + this.parameterFds.length];
tmp[0] = parameterFd;
System.arraycopy(this.parameterFds, 0, tmp, 1, this.parameterFds.length);
return new MethodDescriptor(this.returnFd, tmp);
}
}