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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/util/Location.java')
-rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/util/Location.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/util/Location.java b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/util/Location.java new file mode 100644 index 000000000..ff045a5ec --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/util/Location.java @@ -0,0 +1,168 @@ +/* Location.java -- class to read/write JDWP locations + Copyright (C) 2005, 2006, 2007 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.classpath.jdwp.util; + +import gnu.classpath.jdwp.VMIdManager; +import gnu.classpath.jdwp.VMMethod; +import gnu.classpath.jdwp.exception.JdwpException; +import gnu.classpath.jdwp.id.ClassReferenceTypeId; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; + +/** + * A class to read/write JDWP locations. + * + * @author Aaron Luchko <aluchko@redhat.com> + */ +public class Location +{ + private VMMethod method; + private long index; + + /** + * Create a location with the given parameters. + * + * @param method the method + * @param index location in the method + */ + public Location(VMMethod method, long index) + { + this.method = method; + this.index = index; + } + + /** + * Read a location from the given bytebuffer, consists of a TAG (byte), + * followed by a ReferenceTypeId, a MethodId and an index (long). + * + * @param bb this holds the location + * @throws IOException when an error occurs reading from the buffer + * @throws JdwpException for invalid class or method IDs + */ + public Location(ByteBuffer bb) + throws IOException, JdwpException + { + byte tag = bb.get(); + ClassReferenceTypeId classId = + (ClassReferenceTypeId) VMIdManager.getDefault().readReferenceTypeId(bb); + Class klass = classId.getType(); + method = VMMethod.readId(klass, bb); + index = bb.getLong(); + } + + /** + * Write the given location to an output stream. + * + * @param os stream to write to + * @throws IOException when an error occurs writing to the stream + */ + public void write(DataOutputStream os) + throws IOException + { + // check if this is an empty location + if (method != null) + { + VMIdManager idm = VMIdManager.getDefault(); + ClassReferenceTypeId crti = + (ClassReferenceTypeId) + idm.getReferenceTypeId(method.getDeclaringClass()); + + crti.writeTagged(os); + method.writeId(os); + os.writeLong(index); + } + else + { + os.writeByte(1); + os.writeLong((long) 0); + os.writeLong((long) 0); + os.writeLong((long) 0); + } + } + + /** + * Sets up an empty location + * + * @return new Location (setup as empty) + */ + public static Location getEmptyLocation() + { + return new Location(null, 0); + } + + /** + * Gets the method of this location + * + * @return the method + */ + public VMMethod getMethod() + { + return method; + } + + /** + * Gets the code index of this location + * + * @return the code index + */ + public long getIndex () + { + return index; + } + + // convenient for debugging + public String toString () + { + return method.toString () + "." + index; + } + + public boolean equals(Object obj) + { + if (obj instanceof Location) + { + Location l = (Location) obj; + return (getMethod().equals(l.getMethod()) + && getIndex() == l.getIndex()); + } + + return false; + } +} |