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| com.google.common.collect</FONT> |
| <BR> |
| Class ComparisonChain</H2> |
| <PRE> |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
| <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.collect.ComparisonChain</B> |
| </PRE> |
| <HR> |
| <DL> |
| <DT><PRE>public abstract class <B>ComparisonChain</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL> |
| </PRE> |
| |
| <P> |
| A utility for performing a "lazy" chained comparison statement, which |
| performs comparisons only until it finds a nonzero result. For example: |
| |
| <pre class="code"> <code>public int compareTo(Foo that) { |
| return ComparisonChain.start() |
| .compare(this.aString, that.aString) |
| .compare(this.anInt, that.anInt) |
| .compare(this.anEnum, that.anEnum, Ordering.nullsLast()) |
| .result(); |
| }</code></pre> |
| |
| The value of this expression will have the same sign as the <i>first |
| nonzero</i> comparison result in the chain, or will be zero if every |
| comparison result was zero. |
| |
| <p>Once any comparison returns a nonzero value, remaining comparisons are |
| "short-circuited". |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>Since:</B></DT> |
| <DD>2010.01.04 <b>tentative</b></DD> |
| <DT><B>Author:</B></DT> |
| <DD>Mark Davis, Kevin Bourrillion</DD> |
| </DL> |
| <HR> |
| |
| <P> |
| |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(boolean, boolean)">compare</A></B>(boolean left, |
| boolean right)</CODE> |
| |
| <BR> |
| Compares two <code>boolean</code> values as specified by <A HREF="../../../../com/google/common/primitives/Booleans.html#compare(boolean, boolean)"><CODE>Booleans.compare(boolean, boolean)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(java.lang.Comparable, java.lang.Comparable)">compare</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><?> left, |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><?> right)</CODE> |
| |
| <BR> |
| Compares two comparable objects as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true#compareTo(T)" title="class or interface in java.lang"><CODE>Comparable.compareTo(T)</CODE></A>, <i>if</i> the result of this comparison chain |
| has not already been determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(double, double)">compare</A></B>(double left, |
| double right)</CODE> |
| |
| <BR> |
| Compares two <code>double</code> values as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true#compare(double, double)" title="class or interface in java.lang"><CODE>Double.compare(double, double)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(float, float)">compare</A></B>(float left, |
| float right)</CODE> |
| |
| <BR> |
| Compares two <code>float</code> values as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Float.html?is-external=true#compare(float, float)" title="class or interface in java.lang"><CODE>Float.compare(float, float)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(int, int)">compare</A></B>(int left, |
| int right)</CODE> |
| |
| <BR> |
| Compares two <code>int</code> values as specified by <A HREF="../../../../com/google/common/primitives/Ints.html#compare(int, int)"><CODE>Ints.compare(int, int)</CODE></A>, |
| <i>if</i> the result of this comparison chain has not already been |
| determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(long, long)">compare</A></B>(long left, |
| long right)</CODE> |
| |
| <BR> |
| Compares two <code>long</code> values as specified by <A HREF="../../../../com/google/common/primitives/Longs.html#compare(long, long)"><CODE>Longs.compare(long, long)</CODE></A>, |
| <i>if</i> the result of this comparison chain has not already been |
| determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract |
| <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
| <TR ALIGN="right" VALIGN=""> |
| <TD NOWRAP><FONT SIZE="-1"> |
| <CODE><T> <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| </TR> |
| </TABLE> |
| </CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#compare(T, T, java.util.Comparator)">compare</A></B>(T left, |
| T right, |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util">Comparator</A><T> comparator)</CODE> |
| |
| <BR> |
| Compares two objects using a comparator, <i>if</i> the result of this |
| comparison chain has not already been determined.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>abstract int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#result()">result</A></B>()</CODE> |
| |
| <BR> |
| Ends this comparison chain and returns its result: a value having the |
| same sign as the first nonzero comparison result in the chain, or zero if |
| every result was zero.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>static <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../com/google/common/collect/ComparisonChain.html#start()">start</A></B>()</CODE> |
| |
| <BR> |
| Begins a new chained comparison statement.</TD> |
| </TR> |
| </TABLE> |
| <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
| <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
| </TR> |
| </TABLE> |
| |
| <P> |
| |
| <!-- ============ METHOD DETAIL ========== --> |
| |
| <A NAME="method_detail"><!-- --></A> |
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| <B>Method Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="start()"><!-- --></A><H3> |
| start</H3> |
| <PRE> |
| public static <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>start</B>()</PRE> |
| <DL> |
| <DD>Begins a new chained comparison statement. See example in the class |
| documentation. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(java.lang.Comparable, java.lang.Comparable)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><?> left, |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><?> right)</PRE> |
| <DL> |
| <DD>Compares two comparable objects as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true#compareTo(T)" title="class or interface in java.lang"><CODE>Comparable.compareTo(T)</CODE></A>, <i>if</i> the result of this comparison chain |
| has not already been determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(java.lang.Object,java.lang.Object,java.util.Comparator)"><!-- --></A><A NAME="compare(T, T, java.util.Comparator)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <T> <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(<FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT> |
| T left, |
| <FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT> |
| T right, |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util">Comparator</A><T> comparator)</PRE> |
| <DL> |
| <DD>Compares two objects using a comparator, <i>if</i> the result of this |
| comparison chain has not already been determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(int, int)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(int left, |
| int right)</PRE> |
| <DL> |
| <DD>Compares two <code>int</code> values as specified by <A HREF="../../../../com/google/common/primitives/Ints.html#compare(int, int)"><CODE>Ints.compare(int, int)</CODE></A>, |
| <i>if</i> the result of this comparison chain has not already been |
| determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(long, long)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(long left, |
| long right)</PRE> |
| <DL> |
| <DD>Compares two <code>long</code> values as specified by <A HREF="../../../../com/google/common/primitives/Longs.html#compare(long, long)"><CODE>Longs.compare(long, long)</CODE></A>, |
| <i>if</i> the result of this comparison chain has not already been |
| determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(float, float)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(float left, |
| float right)</PRE> |
| <DL> |
| <DD>Compares two <code>float</code> values as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Float.html?is-external=true#compare(float, float)" title="class or interface in java.lang"><CODE>Float.compare(float, float)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(double, double)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(double left, |
| double right)</PRE> |
| <DL> |
| <DD>Compares two <code>double</code> values as specified by <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true#compare(double, double)" title="class or interface in java.lang"><CODE>Double.compare(double, double)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="compare(boolean, boolean)"><!-- --></A><H3> |
| compare</H3> |
| <PRE> |
| public abstract <A HREF="../../../../com/google/common/collect/ComparisonChain.html" title="class in com.google.common.collect">ComparisonChain</A> <B>compare</B>(boolean left, |
| boolean right)</PRE> |
| <DL> |
| <DD>Compares two <code>boolean</code> values as specified by <A HREF="../../../../com/google/common/primitives/Booleans.html#compare(boolean, boolean)"><CODE>Booleans.compare(boolean, boolean)</CODE></A>, <i>if</i> the result of this comparison chain has not |
| already been determined. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="result()"><!-- --></A><H3> |
| result</H3> |
| <PRE> |
| public abstract int <B>result</B>()</PRE> |
| <DL> |
| <DD>Ends this comparison chain and returns its result: a value having the |
| same sign as the first nonzero comparison result in the chain, or zero if |
| every result was zero. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <!-- ========= END OF CLASS DATA ========= --> |
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