org.codehaus.groovy.classgen.asm.MethodCallerMultiAdapter Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.classgen.asm;
import org.objectweb.asm.MethodVisitor;
public class MethodCallerMultiAdapter {
private MethodCaller[] methods;
boolean skipSpreadSafeAndSafe;
public static final int MAX_ARGS = 0;
public static MethodCallerMultiAdapter newStatic(Class theClass, String baseName, boolean createNArgs, boolean skipSpreadSafeAndSafe) {
MethodCallerMultiAdapter mcma = new MethodCallerMultiAdapter();
mcma.skipSpreadSafeAndSafe = skipSpreadSafeAndSafe;
if (createNArgs) {
int numberOfBaseMethods = mcma.numberOfBaseMethods();
mcma.methods = new MethodCaller[(MAX_ARGS + 2) * numberOfBaseMethods];
for (int i = 0; i <= MAX_ARGS; i++) {
mcma.methods[i * numberOfBaseMethods] = MethodCaller.newStatic(theClass, baseName + i);
if (skipSpreadSafeAndSafe) continue;
mcma.methods[i * numberOfBaseMethods + 1] = MethodCaller.newStatic(theClass, baseName + i + "Safe");
mcma.methods[i * numberOfBaseMethods + 2] = MethodCaller.newStatic(theClass, baseName + i + "SpreadSafe");
}
mcma.methods[(MAX_ARGS + 1) * numberOfBaseMethods] = MethodCaller.newStatic(theClass, baseName + "N");
if (!skipSpreadSafeAndSafe) {
mcma.methods[(MAX_ARGS + 1) * numberOfBaseMethods + 1] = MethodCaller.newStatic(theClass, baseName + "N" + "Safe");
mcma.methods[(MAX_ARGS + 1) * numberOfBaseMethods + 2] = MethodCaller.newStatic(theClass, baseName + "N" + "SpreadSafe");
}
} else if (!skipSpreadSafeAndSafe) {
mcma.methods = new MethodCaller[]{
MethodCaller.newStatic(theClass, baseName),
MethodCaller.newStatic(theClass, baseName + "Safe"),
MethodCaller.newStatic(theClass, baseName + "SpreadSafe")
};
} else {
mcma.methods = new MethodCaller[]{
MethodCaller.newStatic(theClass, baseName)
};
}
return mcma;
}
/**
* @param methodVisitor
* @param numberOfArguments a value >0 describing how many arguments are additionally used for the method call
* @param safe
* @param spreadSafe
*/
public void call(MethodVisitor methodVisitor, int numberOfArguments, boolean safe, boolean spreadSafe) {
int offset = 0;
if (safe && !skipSpreadSafeAndSafe) offset = 1;
if (spreadSafe && !skipSpreadSafeAndSafe) offset = 2;
if (numberOfArguments > MAX_ARGS || numberOfArguments < 0) {
offset += (MAX_ARGS + 1) * numberOfBaseMethods();
} else {
offset += numberOfArguments * numberOfBaseMethods();
}
methods[offset].call(methodVisitor);
}
private int numberOfBaseMethods() {
if (skipSpreadSafeAndSafe) return 1;
return 3;
}
}