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Groovy: A powerful, dynamic language for the JVM
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.classgen;
import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.CompileUnit;
import org.codehaus.groovy.ast.MethodNode;
/**
* A context shared across generations of a class and its inner classes
*
* @author James Strachan
*/
public class GeneratorContext {
private int innerClassIdx = 1;
private int closureClassIdx = 1;
private CompileUnit compileUnit;
public GeneratorContext(CompileUnit compileUnit) {
this.compileUnit = compileUnit;
}
public GeneratorContext(CompileUnit compileUnit, int innerClassOffset) {
this.compileUnit = compileUnit;
this.innerClassIdx = innerClassOffset;
}
public int getNextInnerClassIdx() {
return innerClassIdx++;
}
public CompileUnit getCompileUnit() {
return compileUnit;
}
public String getNextClosureInnerName(ClassNode owner, ClassNode enclosingClass, MethodNode enclosingMethod) {
String methodName = "";
if (enclosingMethod != null) {
methodName = enclosingMethod.getName();
if (enclosingClass.isDerivedFrom(ClassHelper.CLOSURE_TYPE)) {
methodName = "";
} else {
methodName = "_"+encodeAsValidClassName(methodName);
}
}
return methodName + "_closure" + closureClassIdx++;
}
private static final int MIN_ENCODING = ' ';
private static final int MAX_ENCODING = ']';
private static final boolean[] CHARACTERS_TO_ENCODE = new boolean[MAX_ENCODING-MIN_ENCODING+1];
static {
CHARACTERS_TO_ENCODE[' '-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['!'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['/'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['.'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE[';'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['$'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['<'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['>'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['['-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE[']'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE[':'-MIN_ENCODING] = true;
CHARACTERS_TO_ENCODE['\\'-MIN_ENCODING] = true;
}
public static String encodeAsValidClassName(String name) {
final int l = name.length();
StringBuilder b = null;
int lastEscape = -1;
for(int i = 0; i < l; ++i) {
final int encodeIndex = name.charAt(i) - MIN_ENCODING;
if (encodeIndex >= 0 && encodeIndex < CHARACTERS_TO_ENCODE.length) {
if (CHARACTERS_TO_ENCODE[encodeIndex]) {
if(b == null) {
b = new StringBuilder(name.length() + 3);
b.append(name, 0, i);
} else {
b.append(name, lastEscape + 1, i);
}
b.append('_');
lastEscape = i;
}
}
}
if(b == null) return name.toString();
if (lastEscape == -1) throw new GroovyBugError("unexpected escape char control flow in "+name);
b.append(name, lastEscape + 1, l);
return b.toString();
}
}