com.google.gwt.dev.javac.CompiledClass.java Source code

Introduction

Here is the source code for com.google.gwt.dev.javac.CompiledClass.java

Source

/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gwt.dev.javac;

import com.google.gwt.dev.util.Name.InternalName;

import org.apache.commons.lang.ArrayUtils;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ClassFile;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.lookup.LocalTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.NestedTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding;

/**
 * Encapsulates the state of a single compiled class file.
 * XXX Instantiations modified
 */
public final class CompiledClass {

    private static ClassFile getClassFile(TypeDeclaration typeDecl, String binaryName) {
        for (ClassFile tryClassFile : typeDecl.compilationResult().getClassFiles()) {
            char[] tryBinaryName = CharOperation.concatWith(tryClassFile.getCompoundName(), '/');
            if (binaryName.equals(String.valueOf(tryBinaryName))) {
                return tryClassFile;
            }
        }
        assert false;
        return null;
    }

    /**
     * Returns <code>true</code> if this is a local type, or if this type is
     * nested inside of any local type.
     */
    private static boolean isLocalType(SourceTypeBinding binding) {
        SourceTypeBinding b = binding;
        while (!b.isStatic()) {
            if (b instanceof LocalTypeBinding) {
                return true;
            }
            b = ((NestedTypeBinding) b).enclosingType;
        }
        return false;
    }

    protected final CompiledClass enclosingClass;
    protected final String internalName;
    protected final boolean isLocal;
    private byte[] m_bytes;
    protected transient CompilationUnit unit;

    private transient NameEnvironmentAnswer nameEnvironmentAnswer;

    CompiledClass(TypeDeclaration typeDeclaration, CompiledClass enclosingClass) {
        this.enclosingClass = enclosingClass;
        SourceTypeBinding binding = typeDeclaration.binding;
        this.internalName = CharOperation.charToString(binding.constantPoolName());
        this.isLocal = isLocalType(binding);
        ClassFile classFile = getClassFile(typeDeclaration, internalName);
        if (classFile != null) {
            m_bytes = classFile.getBytes();
        } else {
            m_bytes = ArrayUtils.EMPTY_BYTE_ARRAY;
        }
    }

    public CompiledClass(String typeName, byte[] bytes, boolean isLocal, CompiledClass enclosingClass) {
        this.isLocal = isLocal;
        this.m_bytes = bytes;
        this.internalName = typeName;
        this.enclosingClass = enclosingClass;
    }

    /**
       * Returns the bytes of the compiled class.
       */
    public byte[] getBytes() {
        return m_bytes;
    }

    public CompiledClass getEnclosingClass() {
        return enclosingClass;
    }

    /**
     * Returns the binary class name, e.g. {@code java/util/Map$Entry}.
     */
    public String getInternalName() {
        return internalName;
    }

    /**
     * Returns the enclosing package, e.g. {@code java.util}.
     */
    public String getPackageName() {
        return Shared.getPackageNameFromBinary(internalName);
    }

    /**
     * Returns the qualified source name, e.g. {@code java.util.Map.Entry}.
     */
    public String getSourceName() {
        return InternalName.toSourceName(internalName);
    }

    public CompilationUnit getUnit() {
        return unit;
    }

    /**
     * Returns <code>true</code> if this is a local type, or if this type is
     * nested inside of any local type.
     */
    public boolean isLocal() {
        return isLocal;
    }

    @Override
    public String toString() {
        return internalName;
    }

    NameEnvironmentAnswer getNameEnvironmentAnswer() {
        if (nameEnvironmentAnswer == null) {
            try {
                ClassFileReader cfr = new ClassFileReader(getBytes(), unit.getDisplayLocation().toCharArray(),
                        true);
                nameEnvironmentAnswer = new NameEnvironmentAnswer(cfr, null);
            } catch (ClassFormatException e) {
                throw new RuntimeException("Unexpectedly unable to parse class file", e);
            }
        }
        return nameEnvironmentAnswer;
    }

    void initUnit(CompilationUnit unit) {
        assert this.unit == null;
        this.unit = unit;
    }
}