groovy.lang.Tuple Maven / Gradle / Ivy
/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed 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 groovy.lang;
import java.util.AbstractList;
import java.util.List;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
/**
* Represents a list of Integer objects from a specified int up to but not including
* a given and to.
*
* @author James Strachan
* @version $Revision$
*/
public class Tuple extends AbstractList {
private Object[] contents;
private int hashCode;
public Tuple(Object[] contents) {
this.contents = contents;
}
public Object get(int index) {
return contents[index];
}
public int size() {
return contents.length;
}
public boolean equals(Object that) {
if (that instanceof Tuple) {
return equals((Tuple) that);
}
return false;
}
public boolean equals(Tuple that) {
if (contents.length == that.contents.length) {
for (int i = 0; i < contents.length; i++) {
if (! DefaultTypeTransformation.compareEqual(this.contents[i], that.contents[i])) {
return false;
}
}
return true;
}
return false;
}
public int hashCode() {
if (hashCode == 0) {
for (int i = 0; i < contents.length; i++ ) {
Object value = contents[i];
int hash = (value != null) ? value.hashCode() : 0xbabe;
hashCode ^= hash;
}
if (hashCode == 0) {
hashCode = 0xbabe;
}
}
return hashCode;
}
public List subList(int fromIndex, int toIndex) {
int size = toIndex - fromIndex;
Object[] newContent = new Object[size];
System.arraycopy(contents, fromIndex, newContent, 0, size);
return new Tuple(newContent);
}
}