001: /*
002: $Id: Tuple.java 4098 2006-10-10 16:09:48Z blackdrag $
003:
004: Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005:
006: Redistribution and use of this software and associated documentation
007: ("Software"), with or without modification, are permitted provided
008: that the following conditions are met:
009:
010: 1. Redistributions of source code must retain copyright
011: statements and notices. Redistributions must also contain a
012: copy of this document.
013:
014: 2. Redistributions in binary form must reproduce the
015: above copyright notice, this list of conditions and the
016: following disclaimer in the documentation and/or other
017: materials provided with the distribution.
018:
019: 3. The name "groovy" must not be used to endorse or promote
020: products derived from this Software without prior written
021: permission of The Codehaus. For written permission,
022: please contact info@codehaus.org.
023:
024: 4. Products derived from this Software may not be called "groovy"
025: nor may "groovy" appear in their names without prior written
026: permission of The Codehaus. "groovy" is a registered
027: trademark of The Codehaus.
028:
029: 5. Due credit should be given to The Codehaus -
030: http://groovy.codehaus.org/
031:
032: THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033: ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034: NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035: FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
036: THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043: OF THE POSSIBILITY OF SUCH DAMAGE.
044:
045: */
046: package groovy.lang;
047:
048: import java.util.AbstractList;
049: import java.util.List;
050:
051: import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
052:
053: /**
054: * Represents a list of Integer objects from a specified int up to but not including
055: * a given and to.
056: *
057: * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
058: * @version $Revision: 4098 $
059: */
060: public class Tuple extends AbstractList {
061:
062: private Object[] contents;
063: private int hashCode;
064:
065: public Tuple(Object[] contents) {
066: this .contents = contents;
067: }
068:
069: public Object get(int index) {
070: return contents[index];
071: }
072:
073: public int size() {
074: return contents.length;
075: }
076:
077: public boolean equals(Object that) {
078: if (that instanceof Tuple) {
079: return equals((Tuple) that);
080: }
081: return false;
082: }
083:
084: public boolean equals(Tuple that) {
085: if (contents.length == that.contents.length) {
086: for (int i = 0; i < contents.length; i++) {
087: if (!DefaultTypeTransformation.compareEqual(
088: this .contents[i], that.contents[i])) {
089: return false;
090: }
091: }
092: return true;
093: }
094: return false;
095: }
096:
097: public int hashCode() {
098: if (hashCode == 0) {
099: for (int i = 0; i < contents.length; i++) {
100: Object value = contents[i];
101: int hash = (value != null) ? value.hashCode() : 0xbabe;
102: hashCode ^= hash;
103: }
104: if (hashCode == 0) {
105: hashCode = 0xbabe;
106: }
107: }
108: return hashCode;
109: }
110:
111: public List subList(int fromIndex, int toIndex) {
112: int size = toIndex - fromIndex;
113: Object[] newContent = new Object[size];
114: System.arraycopy(contents, fromIndex, newContent, 0, size);
115: return new Tuple(newContent);
116: }
117: }
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