41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 */
60
61 import com.sun.org.apache.bcel.internal.Constants;
62 import com.sun.org.apache.bcel.internal.classfile.*;
63
64 /**
65 * This class represents a line number within a method, i.e., give an instruction
66 * a line number corresponding to the source code line.
67 *
68 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
69 * @see LineNumber
70 * @see MethodGen
71 */
72 public class LineNumberGen
73 implements InstructionTargeter, Cloneable, java.io.Serializable
74 {
75 private InstructionHandle ih;
76 private int src_line;
77
78 /**
79 * Create a line number.
80 *
81 * @param ih instruction handle to reference
82 */
83 public LineNumberGen(InstructionHandle ih, int src_line) {
84 setInstruction(ih);
85 setSourceLine(src_line);
86 }
87
88 /**
89 * @return true, if ih is target of this line number
90 */
91 public boolean containsTarget(InstructionHandle ih) {
92 return this.ih == ih;
93 }
94
95 /**
96 * @param old_ih old target
97 * @param new_ih new target
98 */
99 public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) {
100 if(old_ih != ih)
101 throw new ClassGenException("Not targeting " + old_ih + ", but " + ih + "}");
102 else
103 setInstruction(new_ih);
104 }
105
106 /**
107 * Get LineNumber attribute .
108 *
109 * This relies on that the instruction list has already been dumped to byte code or
110 * or that the `setPositions' methods has been called for the instruction list.
111 */
112 public LineNumber getLineNumber() {
113 return new LineNumber(ih.getPosition(), src_line);
114 }
115
116 public void setInstruction(InstructionHandle ih) {
117 BranchInstruction.notifyTarget(this.ih, ih, this);
118
119 this.ih = ih;
120 }
121
122 public Object clone() {
123 try {
124 return super.clone();
125 } catch(CloneNotSupportedException e) {
126 System.err.println(e);
127 return null;
128 }
129 }
130
131 public InstructionHandle getInstruction() { return ih; }
132 public void setSourceLine(int src_line) { this.src_line = src_line; }
133 public int getSourceLine() { return src_line; }
134 }
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41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 */
60
61 import com.sun.org.apache.bcel.internal.classfile.*;
62
63 /**
64 * This class represents a line number within a method, i.e., give an instruction
65 * a line number corresponding to the source code line.
66 *
67 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
68 * @see LineNumber
69 * @see MethodGen
70 */
71 public class LineNumberGen
72 implements InstructionTargeter, Cloneable, java.io.Serializable
73 {
74 private InstructionHandle ih;
75 private int src_line;
76
77 /**
78 * Create a line number.
79 *
80 * @param ih instruction handle to reference
81 */
82 public LineNumberGen(InstructionHandle ih, int src_line) {
83 setInstruction(ih);
84 setSourceLine(src_line);
85 }
86
87 /**
88 * @return true, if ih is target of this line number
89 */
90 @Override
91 public boolean containsTarget(InstructionHandle ih) {
92 return this.ih == ih;
93 }
94
95 /**
96 * @param old_ih old target
97 * @param new_ih new target
98 */
99 @Override
100 public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) {
101 if(old_ih != ih)
102 throw new ClassGenException("Not targeting " + old_ih + ", but " + ih + "}");
103 else
104 setInstruction(new_ih);
105 }
106
107 /**
108 * Get LineNumber attribute .
109 *
110 * This relies on that the instruction list has already been dumped to byte code or
111 * or that the `setPositions' methods has been called for the instruction list.
112 */
113 public LineNumber getLineNumber() {
114 return new LineNumber(ih.getPosition(), src_line);
115 }
116
117 public final void setInstruction(InstructionHandle ih) {
118 BranchInstruction.notifyTargetChanging(this.ih, this);
119 this.ih = ih;
120 BranchInstruction.notifyTargetChanged(this.ih, this);
121 }
122
123 @Override
124 public Object clone() {
125 try {
126 return super.clone();
127 } catch(CloneNotSupportedException e) {
128 System.err.println(e);
129 return null;
130 }
131 }
132
133 public InstructionHandle getInstruction() { return ih; }
134 public void setSourceLine(int src_line) { this.src_line = src_line; }
135 public int getSourceLine() { return src_line; }
136 }
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