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18 package org.apache.bcel.classfile;
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20 import java.io.DataInput;
21 import java.io.DataOutputStream;
22 import java.io.IOException;
23 import java.util.Arrays;
24 import java.util.Iterator;
25 import java.util.stream.Stream;
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27 import org.apache.bcel.Const;
28 import org.apache.bcel.util.Args;
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61 public class LocalVariableTypeTable extends Attribute implements Iterable<LocalVariable> {
62
63 private static final LocalVariable[] EMPTY_ARRAY = {};
64
65 private LocalVariable[] localVariableTypeTable;
66
67 LocalVariableTypeTable(final int nameIdx, final int len, final DataInput input, final ConstantPool cpool) throws IOException {
68 this(nameIdx, len, (LocalVariable[]) null, cpool);
69 final int localVariableTypeTableLength = input.readUnsignedShort();
70 localVariableTypeTable = new LocalVariable[localVariableTypeTableLength];
71 for (int i = 0; i < localVariableTypeTableLength; i++) {
72 localVariableTypeTable[i] = new LocalVariable(input, cpool);
73 }
74 }
75
76 public LocalVariableTypeTable(final int nameIndex, final int length, final LocalVariable[] localVariableTypeTable, final ConstantPool constantPool) {
77 super(Const.ATTR_LOCAL_VARIABLE_TYPE_TABLE, nameIndex, length, constantPool);
78 this.localVariableTypeTable = localVariableTypeTable != null ? localVariableTypeTable : LocalVariable.EMPTY_ARRAY;
79 Args.requireU2(this.localVariableTypeTable.length, "localVariableTypeTable.length");
80 }
81
82 public LocalVariableTypeTable(final LocalVariableTypeTable c) {
83 this(c.getNameIndex(), c.getLength(), c.getLocalVariableTypeTable(), c.getConstantPool());
84 }
85
86 @Override
87 public void accept(final Visitor v) {
88 v.visitLocalVariableTypeTable(this);
89 }
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94 @Override
95 public Attribute copy(final ConstantPool constantPool) {
96 final LocalVariableTypeTable c = (LocalVariableTypeTable) clone();
97 c.localVariableTypeTable = new LocalVariable[localVariableTypeTable.length];
98 Arrays.setAll(c.localVariableTypeTable, i -> localVariableTypeTable[i].copy());
99 c.setConstantPool(constantPool);
100 return c;
101 }
102
103 @Override
104 public final void dump(final DataOutputStream file) throws IOException {
105 super.dump(file);
106 file.writeShort(localVariableTypeTable.length);
107 for (final LocalVariable variable : localVariableTypeTable) {
108 variable.dump(file);
109 }
110 }
111
112 public final LocalVariable getLocalVariable(final int index) {
113 for (final LocalVariable variable : localVariableTypeTable) {
114 if (variable.getIndex() == index) {
115 return variable;
116 }
117 }
118 return null;
119 }
120
121 public final LocalVariable[] getLocalVariableTypeTable() {
122 return localVariableTypeTable;
123 }
124
125 public final int getTableLength() {
126 return localVariableTypeTable == null ? 0 : localVariableTypeTable.length;
127 }
128
129 @Override
130 public Iterator<LocalVariable> iterator() {
131 return Stream.of(localVariableTypeTable).iterator();
132 }
133
134 public final void setLocalVariableTable(final LocalVariable[] localVariableTable) {
135 this.localVariableTypeTable = localVariableTable != null ? localVariableTable : EMPTY_ARRAY;
136 }
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139
140
141 @Override
142 public final String toString() {
143 final StringBuilder buf = new StringBuilder();
144 for (int i = 0; i < localVariableTypeTable.length; i++) {
145 buf.append(localVariableTypeTable[i].toStringShared(true));
146 if (i < localVariableTypeTable.length - 1) {
147 buf.append('\n');
148 }
149 }
150 return buf.toString();
151 }
152 }