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/* *******************************************************************
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* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
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* This program and the accompanying materials are made available
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* under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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* PARC initial implementation
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* ******************************************************************/
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package org.aspectj.weaver.patterns;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Modifier;
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import java.util.HashMap;
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import org.aspectj.weaver.VersionedDataInputStream;
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public class ModifiersPattern extends PatternNode {
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private int requiredModifiers;
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private int forbiddenModifiers;
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public static final ModifiersPattern ANY = new ModifiersPattern(0, 0);
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public ModifiersPattern(int requiredModifiers, int forbiddenModifiers) {
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this.requiredModifiers = requiredModifiers;
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this.forbiddenModifiers = forbiddenModifiers;
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public String toString() {
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if (this == ANY) return "";
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String ret = Modifier.toString(requiredModifiers);
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if (forbiddenModifiers == 0) return ret;
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else return ret + " !" + Modifier.toString(forbiddenModifiers);
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public boolean equals(Object other) {
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if (!(other instanceof ModifiersPattern)) return false;
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ModifiersPattern o = (ModifiersPattern)other;
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return o.requiredModifiers == this.requiredModifiers &&
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o.forbiddenModifiers == this.forbiddenModifiers;
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public int hashCode() {
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result = 37*result + requiredModifiers;
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result = 37*result + forbiddenModifiers;
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public boolean matches(int modifiers) {
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return ((modifiers & requiredModifiers) == requiredModifiers) &&
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((modifiers & forbiddenModifiers) == 0);
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public static ModifiersPattern read(VersionedDataInputStream s) throws IOException {
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int requiredModifiers = s.readShort();
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int forbiddenModifiers = s.readShort();
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if (requiredModifiers == 0 && forbiddenModifiers == 0) return ANY;
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return new ModifiersPattern(requiredModifiers, forbiddenModifiers);
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* @see org.aspectj.weaver.patterns.PatternNode#write(DataOutputStream)
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public void write(DataOutputStream s) throws IOException {
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//s.writeByte(MODIFIERS_PATTERN);
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s.writeShort(requiredModifiers);
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s.writeShort(forbiddenModifiers);
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private static Map modifierFlags = null;
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public static int getModifierFlag(String name) {
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if (modifierFlags == null) {
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modifierFlags = new HashMap();
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while (flag <= Modifier.STRICT) {
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String flagName = Modifier.toString(flag);
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modifierFlags.put(flagName, new Integer(flag));
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Integer flag = (Integer)modifierFlags.get(name);
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if (flag == null) return -1;
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return flag.intValue();
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public Object accept(PatternNodeVisitor visitor, Object data) {
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return visitor.visit(this, data);