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The core functionality of the CodeModel java source code generation library
There is a newer version: 2.6
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2008 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package com.sun.codemodel;

import java.util.Iterator;
import java.util.List;
import java.util.Collections;
import java.util.ArrayList;

/**
 * Represents X<Y>.
 *
 * TODO: consider separating the decl and the use.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
class JNarrowedClass extends JClass {
    /**
     * A generic class with type parameters.
     */
    final JClass basis;
    /**
     * Arguments to those parameters.
     */
    private final List args;

    JNarrowedClass(JClass basis, JClass arg) {
        this(basis,Collections.singletonList(arg));
    }
    
    JNarrowedClass(JClass basis, List args) {
        super(basis.owner());
        this.basis = basis;
        assert !(basis instanceof JNarrowedClass);
        this.args = args;
    }

    public JClass narrow( JClass clazz ) {
        List newArgs = new ArrayList(args);
        newArgs.add(clazz);
        return new JNarrowedClass(basis,newArgs);
    }

    public JClass narrow( JClass... clazz ) {
        List newArgs = new ArrayList(args);
        for (JClass c : clazz)
            newArgs.add(c);
        return new JNarrowedClass(basis,newArgs);
    }

    public String name() {
        StringBuffer buf = new StringBuffer();
        buf.append(basis.name());
        buf.append('<');
        boolean first = true;
        for (JClass c : args) {
            if(first)
                first = false;
            else
                buf.append(',');
            buf.append(c.name());
        }
        buf.append('>');
        return buf.toString();
    }
    
    public String fullName() {
        StringBuilder buf = new StringBuilder();
        buf.append(basis.fullName());
        buf.append('<');
        boolean first = true;
        for (JClass c : args) {
            if(first)
                first = false;
            else
                buf.append(',');
            buf.append(c.fullName());
        }
        buf.append('>');
        return buf.toString();
    }

    public String binaryName() {
        StringBuilder buf = new StringBuilder();
        buf.append(basis.binaryName());
        buf.append('<');
        boolean first = true;
        for (JClass c : args) {
            if(first)
                first = false;
            else
                buf.append(',');
            buf.append(c.binaryName());
        }
        buf.append('>');
        return buf.toString();
    }

    public void generate(JFormatter f) {
        f.t(basis).p('<').g(args).p(JFormatter.CLOSE_TYPE_ARGS);
    }

    @Override
    void printLink(JFormatter f) {
        basis.printLink(f);
        f.p("{@code <}");
        boolean first = true;
        for( JClass c : args ) {
            if(first)
                first = false;
            else
                f.p(',');
            c.printLink(f);
        }
        f.p("{@code >}");
    }

    public JPackage _package() {
        return basis._package();
    }

    public JClass _extends() {
        JClass base = basis._extends();
        if(base==null)  return base;
        return base.substituteParams(basis.typeParams(),args);
    }

    public Iterator _implements() {
        return new Iterator() {
            private final Iterator core = basis._implements();
            public void remove() {
                core.remove();
            }
            public JClass next() {
                return core.next().substituteParams(basis.typeParams(),args);
            }
            public boolean hasNext() {
                return core.hasNext();
            }
        };
    }

    public JClass erasure() {
        return basis;
    }

    public boolean isInterface() {
        return basis.isInterface();
    }

    public boolean isAbstract() {
        return basis.isAbstract();
    }

    public boolean isArray() {
        return false;
    }


    //
    // Equality is based on value
    //

    public boolean equals(Object obj) {
        if(!(obj instanceof JNarrowedClass))   return false;
        return fullName().equals(((JClass)obj).fullName());
    }

    public int hashCode() {
        return fullName().hashCode();
    }

    protected JClass substituteParams(JTypeVar[] variables, List bindings) {
        JClass b = basis.substituteParams(variables,bindings);
        boolean different = b!=basis;
        
        List clazz = new ArrayList(args.size());
        for( int i=0; i getTypeParameters() {
        return args;
    }
}