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langtools/src/share/classes/sun/tools/javap/FieldData.java

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+/*
+ * Copyright 2002 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+
+package sun.tools.javap;
+
+import java.util.*;
+import java.io.*;
+
+/**
+ * Strores field data informastion.
+ *
+ * @author  Sucheta Dambalkar (Adopted code from jdis)
+ */
+
+public class FieldData implements RuntimeConstants  {
+
+    ClassData cls;
+    int access;
+    int name_index;
+    int descriptor_index;
+    int attributes_count;
+    int value_cpx=0;
+    boolean isSynthetic=false;
+    boolean isDeprecated=false;
+    Vector attrs;
+
+    public FieldData(ClassData cls){
+        this.cls=cls;
+    }
+
+    /**
+     * Read and store field info.
+     */
+    public void read(DataInputStream in) throws IOException {
+        access = in.readUnsignedShort();
+        name_index = in.readUnsignedShort();
+        descriptor_index = in.readUnsignedShort();
+        // Read the attributes
+        int attributes_count = in.readUnsignedShort();
+        attrs=new Vector(attributes_count);
+        for (int i = 0; i < attributes_count; i++) {
+            int attr_name_index=in.readUnsignedShort();
+            if (cls.getTag(attr_name_index)!=CONSTANT_UTF8) continue;
+            String attr_name=cls.getString(attr_name_index);
+            if (attr_name.equals("ConstantValue")){
+                if (in.readInt()!=2)
+                    throw new ClassFormatError("invalid ConstantValue attr length");
+                value_cpx=in.readUnsignedShort();
+                AttrData attr=new AttrData(cls);
+                attr.read(attr_name_index);
+                attrs.addElement(attr);
+            } else if (attr_name.equals("Synthetic")){
+                if (in.readInt()!=0)
+                    throw new ClassFormatError("invalid Synthetic attr length");
+                isSynthetic=true;
+                AttrData attr=new AttrData(cls);
+                attr.read(attr_name_index);
+                attrs.addElement(attr);
+            } else if (attr_name.equals("Deprecated")){
+                if (in.readInt()!=0)
+                    throw new ClassFormatError("invalid Synthetic attr length");
+                isDeprecated = true;
+                AttrData attr=new AttrData(cls);
+                attr.read(attr_name_index);
+                attrs.addElement(attr);
+            } else {
+                AttrData attr=new AttrData(cls);
+                attr.read(attr_name_index, in);
+                attrs.addElement(attr);
+            }
+        }
+
+    }  // end read
+
+    /**
+     * Returns access of a field.
+     */
+    public String[] getAccess(){
+        Vector v = new Vector();
+        if ((access & ACC_PUBLIC)   !=0) v.addElement("public");
+        if ((access & ACC_PRIVATE)   !=0) v.addElement("private");
+        if ((access & ACC_PROTECTED)   !=0) v.addElement("protected");
+        if ((access & ACC_STATIC)   !=0) v.addElement("static");
+        if ((access & ACC_FINAL)    !=0) v.addElement("final");
+        if ((access & ACC_VOLATILE) !=0) v.addElement("volatile");
+        if ((access & ACC_TRANSIENT) !=0) v.addElement("transient");
+        String[] accflags = new String[v.size()];
+        v.copyInto(accflags);
+        return accflags;
+    }
+
+    /**
+     * Returns name of a field.
+     */
+    public String getName(){
+        return cls.getStringValue(name_index);
+    }
+
+    /**
+     * Returns internal signature of a field
+     */
+    public String getInternalSig(){
+        return cls.getStringValue(descriptor_index);
+    }
+
+    /**
+     * Returns java type signature of a field.
+     */
+    public String getType(){
+        return new TypeSignature(getInternalSig()).getFieldType();
+    }
+
+    /**
+     * Returns true if field is synthetic.
+     */
+    public boolean isSynthetic(){
+        return isSynthetic;
+    }
+
+    /**
+     * Returns true if field is deprecated.
+     */
+    public boolean isDeprecated(){
+        return isDeprecated;
+    }
+
+    /**
+     * Returns index of constant value in cpool.
+     */
+    public int getConstantValueIndex(){
+        return (value_cpx);
+    }
+
+    /**
+     * Returns list of attributes of field.
+     */
+    public Vector getAttributes(){
+        return attrs;
+    }
+}