AstClosureSuffix.java

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */

/* Generated By:JJTree: Do not edit this line. AstClosureSuffix.java */

package org.jboss.el.parser;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;

import javax.el.ELException;
import javax.el.MethodInfo;

import org.jboss.el.lang.EvaluationContext;


@SuppressWarnings({"rawtypes", "static-access", "unchecked"})
public final class AstClosureSuffix extends ValueSuffixNode {
	
	public AstClosureSuffix(int id) {
		super(id);
	}
	
	protected final AstClosure closure() {
		return (AstClosure) this.children[0];
	}
	
	protected static final Collection toCollection(Object base, boolean force) {
		if (base == null) {
			return null;
		} else if (base instanceof Collection) {
			return (Collection) base;
		} else if (base instanceof Map) {
			return ((Map) base).entrySet();
		} else if (base.getClass().isArray()) {
			return Arrays.asList((Object[]) base);
		} else if (force) {
			throw new ELException(base.getClass().getName() + " is not an instance of Iterable or cannot be coerced to Iterable.");
		} else {
			return null;
		}
	}
	
	protected static final Collection toCollection(Object base) {
		return toCollection(base, true);
	}

	 public boolean isReadOnly(Object base, EvaluationContext ctx) throws ELException {
		Collection c = this.toCollection(base);
		if (c == null || c.isEmpty()) {
			return true;
		} else {
			AstClosure closure = this.closure();
			Object first = c.iterator().next();
			return closure.isReadOnly(first, ctx);
		}
	}
	
	public Object getValue(Object base, EvaluationContext ctx) throws ELException {
		Collection c = this.toCollection(base);
		if (c == null) {
			return null;
		} else if (c.isEmpty()) {
			return Collections.EMPTY_LIST;
		} else {
			Object v;
			Collection r = new ClosureList(c.size());
			AstClosure closure = this.closure();
			for (Object o : c) {
				v = closure.getValue(o, ctx);
				if (v instanceof ClosureList) {
					r.addAll((ClosureList) v);
				} else {
					r.add(v);
				}
			}
			return r;
		}
	}
	
	public Class getType(Object base, EvaluationContext ctx) throws ELException {
		return Collection.class;
	}
	
	public Object getTarget(Object base, EvaluationContext ctx) throws ELException {
		Collection c = this.toCollection(base);
		if (c == null || c.isEmpty()) {
			return null;
		} else {
			Object v;
			Collection r = new ClosureList(c.size());
			AstClosure closure = this.closure();
			for (Object o : c) {
				v = closure.getValue(o, ctx);
				if (v instanceof ClosureList) {
					r.addAll((ClosureList) v);
				} else {
					r.add(v);
				}
			}
			return r;
		}
	}
	
	public MethodInfo getMethodInfo(Object base, EvaluationContext ctx, Class[] paramTypes) throws ELException {
		Collection c = this.toCollection(base);
		if (c == null || c.isEmpty()) {
			return null;
		} else {
			AstClosure closure = this.closure();
			Object first = c.iterator().next();
			return closure.getMethodInfo(first, ctx, paramTypes);
		}
	}
	
	public Object invoke(Object base, EvaluationContext ctx, Class[] paramTypes, Object[] paramValues) throws ELException {
		Collection c = this.toCollection(base);
		if (c == null) {
			return null;
		} else if (c.isEmpty()) {
			return Collections.EMPTY_LIST;
		} else {
			Object v;
			Collection r = new ClosureList(c.size());
			AstClosure closure = this.closure();
			for (Object o : c) {
				v = closure.invoke(o, ctx, paramTypes, paramValues);
				if (v instanceof ClosureList) {
					r.addAll((ClosureList) v);
				} else {
					r.add(v);
				}
			}
			return r;
		}
	}
	
	public void setValue(Object base, EvaluationContext ctx, Object value) throws ELException {
		Collection c = this.toCollection(base);
		if (c != null && !c.isEmpty()) {
			AstClosure closure = this.closure();
			for (Object o : c) {
				closure.setValue(o, ctx, value);
			}
		}
	}
	
	@SuppressWarnings("serial")
	private static class ClosureList extends ArrayList {
		public ClosureList(int size) {
			super(size);
		}
	}
}