massive cleanup of Type.java; introduced human-readable toString() and one-instance...

[org.ibex.classgen.git] / src / org / ibex / classgen / FieldGen.java

diff --git a/src/org/ibex/classgen/FieldGen.java b/src/org/ibex/classgen/FieldGen.java
index 39e91c0..479a481 100644 (file)
--- a/src/org/ibex/classgen/FieldGen.java
+++ b/src/org/ibex/classgen/FieldGen.java
@@ -2,27 +2,61 @@ package org.ibex.classgen;
 
 import java.io.*;
 
+/** Class representing a field in a generated classfile
+    @see ClassGen#addField */
 public class FieldGen implements CGConst {
     private final CPGen cp;
     private final String name;
     private final Type type;
     private final int flags;
-    private final AttrGen attrs;
+    private final ClassGen.AttrGen attrs;
     
-    FieldGen(ClassGen owner, String name,Type type, int flags) {
+    private Object constantValue;
+
+    public String toString() { StringBuffer sb = new StringBuffer(); toString(sb); return sb.toString(); }
+    public void   toString(StringBuffer sb) {
+        sb.append(ClassGen.flagsToString(flags));
+        sb.append(type);
+        sb.append(" ");
+        sb.append(name);
+        sb.append(";");
+        // FIXME: attrs
+    }
+    
+    FieldGen(CPGen cp, DataInput in) throws IOException {
+        this.cp = cp;
+        flags = in.readShort();
+        name = cp.getUtf8ByIndex(in.readShort());
+        type = cp.getType(in.readShort());
+        attrs = new ClassGen.AttrGen(cp, in);
+    }
+
+    FieldGen(ClassGen owner, String name, Type type, int flags) {
         if((flags & ~(ACC_PUBLIC|ACC_PRIVATE|ACC_PROTECTED|ACC_VOLATILE|ACC_TRANSIENT|ACC_STATIC|ACC_FINAL)) != 0)
             throw new IllegalArgumentException("invalid flags");
         this.cp = owner.cp;
         this.name = name;
         this.type = type;
         this.flags = flags;
-        this.attrs = new AttrGen(cp);
+        this.attrs = new ClassGen.AttrGen(cp);
         
         cp.addUtf8(name);
         cp.addUtf8(type.getDescriptor());
     }
     
-    public void dump(DataOutput o) throws IOException {
+    /** Sets the ContantValue attribute for this field. 
+        @param val The value to set this field to. Must be an Integer, Long, Float, Double, or String */
+    public void setConstantValue(Object val) {
+        if((flags & ACC_STATIC) == 0) throw new IllegalStateException("field does not have the ACC_STATIC bit set");
+        constantValue = val;
+    }
+    
+    void finish() {
+        if(constantValue != null && !attrs.contains("ConstantValue"))
+            attrs.add("ConstantValue", cp.add(constantValue));
+    }
+    
+    void dump(DataOutput o) throws IOException {
         o.writeShort(flags);
         o.writeShort(cp.getUtf8Index(name));
         o.writeShort(cp.getUtf8Index(type.getDescriptor()));